The answer is no. The only loss you have is in the coax. The choke
itself doesn't cause any loss.
Bert VE3NR
On 2021-04-22 15:36, Tony wrote:
 
All:
 Installed an RF choke at the feed point of my portable linked dipole 
and immediately noticed a significant drop in common mode noise while 
testing the setup at my QTH.
 Isolating the coax from the antenna greatly improved the S/N ratio 
which I thought could help in the field when close to a noisy location.
 This is probably a silly question, but I run QRP/CW when portable and 
was wondering if the choke can cause any appreciable insertion loss on 
the transmitted signal?
Tony
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